Specialized High Temperature Expansion Joints

Used to Solve Problems in Fluid Bed Boiler

Circulating fluid bed boilers use fluidized sand in the bed of the boiler to facilitate the burning of the various fuels. In most circulating fluid bed boilers, it is necessary to convey hot sand through piping at one point or another in the process. Where sand is conveyed through hot wall pipe, there are unusual design problems that must be considered for the expansion joints that are required to handle the axial growth of the piping.

Design problems for such a system includes the analysis and design for vibration that is caused by the changing momentum of sand as it passes through the pipe/ expansion joint system. Also, the anchor structures attached to the 1300 degree F. hot wall pipe must be designed to allow for expansion of the pipe without imposing unreasonable stresses. However, the anchor structures must provide a firm grip on the pipe to handle dead weight and vibrations. The expansion joint designs must be able to handle sand of all grain sizes without becoming plugged and rigid.

Senior Flexonics Pathwayworked closely with Riley Stoker to achieve solutions to the above problems by providing experienced engineers to work with project people at Riley Stoker and full consulting services that included pipe stress analysis.

To find out more about Senior Flexonics Pathwayhigh temperature design capabilities,contact Senior Flexonics Pathway.